The management of intracranial aneurysms (IAs) remarkably improved due to the development of diagnostic and surgical procedures. Subarachnoid hemorrhage (SAH) from IA rupture constitutes a devastating event, whose prognosis remains unsatisfactory. At present, several researchs are targeted to individuate subjects harboring unruptured IAs and those presenting a higher risk for rupture. Numerous risk factors for the rupture of lAs have been individuated. The prevalence of intracranial saccular aneurysms in the general population is estimated from 0.2% to 6.8%, with an incidence of SAH at 10/100,000/year. The most relevant morbidity and mortality rates after SAH are related to rebleeding and vasospasm. The primary therapeutic target consists in prevention of rebleeding. At present, therapeutic opportunities for intracranial aneurysms are microsurgery and endovascular treatment.
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